package com.rem.designPattern.facade外观;

/**
 * @author Rem
 * @date 2022-11-17
 */
public class Screen {
    private static final Screen SCREEN = new Screen();

    public static Screen getInstance() {
        return SCREEN;
    }

    public void up() {
        System.out.println("升起荧幕...");
    }

    public void down() {
        System.out.println("拉下荧幕...");
    }
}